Trigonometric function overlay



FIG. 1 is a perspective view showing a trigonometric function overlay, according to my new design, showing movable arms of the device in one position of use;

FIG. 2 is a front plan view thereof;

FIG. 3 is a rear plan view thereof;

FIG. 4 is a left edge view thereof;

FIG. 5 is a right edge view thereof;

FIG. 6 is a top edge view thereof;

FIG. 7 is a bottom edge view thereof;

FIG. 8 is a perspective view similar to FIG. 1showing a modified embodiment thereof;

FIG. 9 is another perspective view similar to FIG. 8, showing a further modified embodiment thereof;

FIG. 10 is another perspective view similar to FIG. 8, showing still further modified embodiment thereof; and,

FIG. 11 is another perspective view similar to FIG. 10, showing the embodiment of FIG. 10 in a different position, a position of storage. 

The ornamental design for a trigonometric function overlay, as shown and described. 